Pinpoint Test X: U3003
- X1 RETRIEVE ALL CMDTCs IN ALL MODULES
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - All CMDTCs .
- Is B1317, B1318 or B1676 present in one or more modules AND P0563, P0620, P0625, P0626 or P065B present in the PCM?
- Yes : REFER to CHARGING SYSTEM for diagnosis of the battery and charging system.
- No : GO to X2.
- X2 CHECK BATTERY CONDITION
- Ignition OFF.
- Refer to BATTERY, MOUNTING AND CABLES and carry out the Battery - Condition Test.
- Does the battery pass the condition test?
- Yes
: If the battery passed the condition test but required a recharge, REFER to
CHARGING SYSTEM
to diagnose the charging system. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). TEST the system for normal operation.
If the battery passed the condition test and did not require a recharge, GO to X3.
- No : INSTALL a new battery. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). TEST the system for normal operation.
- X3 CHECK THE CHARGING SYSTEM VOLTAGE NOTE: Do not allow the engine RPM to increase above 2,000 RPM while performing this step or the generator may self excite and result in default charging system output voltage. If engine RPM has gone above 2,000 RPM, shut the vehicle OFF and restart the engine before performing this step.
- Start the engine.
- Measure the voltage of the battery:
- For DTC U3006:1A, turn off all accessories and run the engine at 1,500 RPM for a minimum of 2 minutes.
- For DTC U3006:1B, turn on headlights and HVAC fan on high and run engine at 1,500 RPM for a minimum of 2 minutes.
- Is the battery voltage between 13-15.2 volts?
- Yes
: For DTC U3006:1A
, GO to X4.
For DTC U3006:1B , INSTALL a new HVAC module. REFER to CLIMATE CONTROL . CLEAR all CMDTCs. REPEAT the self-test.
- No : REFER to CHARGING SYSTEM to diagnose the charging system. CLEAR all CMDTCs . TEST the system for normal operation.
- X4 CHECK CIRCUITS SBP15 (WH/RD) FOR AN OPEN
- Ignition OFF.
- Disconnect: HVAC Module C228a.
- Ignition ON.
- With the engine running, measure the voltage between HVAC module C228a-13, circuit SBP15 (WH/RD), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to X5.
- No : VERIFY Smart Junction Box (SJB) fuse 15 (10A) is OK. If OK, REPAIR circuit SBP15 (WH/RD) for an open. CLEAR all CMDTCs . REPEAT the self-test. If not OK, REFER to the appropriate Systems Wiring Diagram to identify the possible causes of the circuit short.
- X5 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between HVAC module C228a-23, circuit GD116 (BK/VT), harness side and ground.
- Repeat this measurement while wiggling the harness.
- Is the resistance less than 5 ohms?
- Yes : GO to X6.
- No : REPAIR circuit GD116 (BK/VT) for an open. TEST the system for normal operation.
- X6 CHECK MODULE CONNECTION
- Carry out the HVAC Module Cold Boot Process.
- Carry out the HVAC Module On-Demand Self Test.
- Operate the system.
- Does the concern return?
- Yes : INSTALL a new HVAC module. REFER to CLIMATE CONTROL . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.